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File backup method and main storage device

A technology of backup storage and file backup, applied in the field of data communication, can solve the problem of waste of storage space and so on

Active Publication Date: 2014-11-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In incremental backup and differential backup, the entire file that has been added or modified will be backed up. For example, a 10G file is modified, but only 1KB of data in the 10G file has changed. According to the existing incremental Backup and differential backup methods need to back up all the 10G files, resulting in a lot of wasted storage space

Method used

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  • File backup method and main storage device
  • File backup method and main storage device
  • File backup method and main storage device

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Embodiment Construction

[0114] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0115] figure 1 It is a schematic structural diagram of a file storage system applicable to various embodiments of the present invention, such as figure 1 As shown, the file storage system includes a primary storage device and a backup storage device. Include the storage space of main file and local backup buffer in the main storage device, the ...

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Abstract

The embodiment of the invention provides a file backup method and a main storage device. According to the file backup method, the storage space of a main file in the main storage device is divided into N secondary data blocks, at every backup moment of incremental backup, data in the updated secondary data blocks from the previous backup moment to the current backup moment are copied to a local backup buffer area, and at every backup moment of differential backup, data in the updated secondary data blocks from the initial backup moment to the current backup moment are copied to the local backup buffer area. Because the main storage device only needs to synchronize the data in the updated secondary data blocks stored in the local backup buffer area and the data in the secondary data blocks which are not updated do not need to be synchronized, the data size of file backup can be reduced, file backup efficiency is improved, and the storage space of the backup data is saved.

Description

technical field [0001] The embodiment of the present invention relates to data communication technology, in particular to a file backup method and a main storage device. Background technique [0002] Data backup is a common method to protect enterprise core data. In many enterprise applications, there are a large number of files, such as IBM lotus Motes MSF files and virtual machine virtual disk files (VMDK / VHD). The files are large and often change. If all files are fully backed up for each backup, it will consume a very large storage space, which will undoubtedly increase the IT investment of the enterprise. [0003] In view of the above problems, differential backup and incremental backup are usually used in the prior art. Incremental backup needs to back up the files added or modified after the last full backup or last incremental backup, and differential backup needs to back up the last full backup. Files that were added or modified later. In incremental backup and di...

Claims

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Application Information

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IPC IPC(8): G06F11/14G06F17/30
Inventor 秦祖福
Owner HUAWEI TECH CO LTD
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